Rolling-mill.



J. S. WORTH.

ROLLING MILL.

APPLICATION FILED JULY 6.1916.

1,2063%. Patented Nov. 28, 1916.

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J. S. WORTH.

ROLLING MILL.

APPLICATION FILED JULY 6. 19I6- 1 06,746. Patented Nov. 28, 1916. I 2 SHEETSSHEET 2.

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JOHN S. WORTH, 0F COATES'VILLE, PENNSYLVANIA, ASSIGNOR T0 HIM-SELF AND WILLIAM P. WORTH, OF COATESVILLE, PENNSYLVANIA.

ROLLING-MILL.

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Original application filed September 28, 1915, Serial No. 53,095.

Specification of Letters Patent.

1916. Serial No. 107,810.

I '0 all "whom it may concern Be it known that I, JOHN S. W ORTH, a citizen of the United States, and a resident of Coatesville. county of Chester, State of Pennsylmnia, have invented certain Improvements in Rolling-Mills, of which the following is a specification.

My invention relates to certain improvements in means for driving the rolls of a rolling mill.

The main obj ect of my invention is to provide means for independently driving the working rolls of the mill and to eliminate the gearing.

A further object of the invention is to dispense with the frequent dressing and sizing of the rolls and to improve the product by obliterating the infinitesimal waves which are formed in the plates due to the lost motion in the gearing.

This application is a division of an application filed by me on the 28th day of September, 1915, under Serial No. 53,095.

In the accompanying drawings:Figure 1, is a side view of a three-high mill in which supporting rolls are used and illustrating my improved means for independently driving the working rolls; Fig. 2, is a sectional view on the line 2-2, Fig. 1; Fig. 3, is a side flew, showing the housings in dotted lines, of a threehigh mill and illustrating the independent driving means; Fig. 4, is a sectional view on the line 1-4, Fig. 8; Fig. 5, is a side view of a two-high mill and showing the housings in dotted lines and illustrating the independent drive; and Fig. 6, is a sectional view on the line 6-6, Fig. 5.

In the above noted application I have claimed broadly the idea of the independent drive, whether the working rolls are driven indirectly through the supporting rolls or whether driven directly. In the present application, I have limited the claims to the independent direct driving of the rolls.

Referring in the first instance to Figs. 1 and 2, 1 is the lower working roll and 2 is the upper working roll. 3 is the intermediate roll. 4t is the lower supporting roll and 5 is the upper supporting roll. These rolls are mounted in housings and the pressure is regulated by set screws 7 at the upper ends of the housings. In the present instance, I have illustrated a horizontal steam engine as a driving element, but it will be understood that electric motors, or other types of engines, may be used without d8".

parting from the essential features of the invention. 8 is the engine having a crank shaft 11, which is connected to the upper working roll 2 by a coupling shaft 12. The couplings 12 are of the ordinary flexible type. 9 is an engine having a crank shaft 14 which is connected to the lower working roll 1 by a coupling shaft 15. The conplings 15 of this shaft are of the ordinary construction. In this case, the intermediate roll 3 is not driven. By this construction, it will be seen that the engine or motor 8 directly drives the roll 2 without the use of intervening vgearing and the engine 9 drives the working roll 1 without the use of intervening gearing. These engines can be so designed and set that the surface speed of both rolls will be the same. Thus the ordinary gearing that is now universally used in rolling mill practice for rolling plates and other products is entirely dispensed with. When the rolls are driven through the gearing they must have the same proportion one to another that the gears bear to each other. When one roll is dressed then the other roll must be dressed so as to keep the diameters the same, as otherwise it will cause a breakage of the gears and if the rolls vary in surface speed, as would be the case where one roll is slightly greater in diameter than the other, the surface of the plate would have the infinitesimal waves, which are objectionable, and which cannot be avoided in the present method of driving the rolls.

I have found that, by independently driving the rolls and so regulating the driving means that the surface speed of the rolls is the same, I obliterate entirely the infinitesimal waves and produce an exceedingly satisfactory product.

In Fig. 1, I have illustrated a three-high rolling mill using supporting rolls for the working rolls. These rolls are used to support the driving rolls, consequently, the driving rolls can be much less in diameter than rolls which are not supported and where they of considerable length.

In the pending application, of which this is a division, I have illustrated a method of driving in which the working rolls are driven through the supporting rolls and in g which the intermediate roll is also driven in some instances. 1

In Figs. 3 and at, I have illustrated a threehigh mill inwhich the working rolls 1 and 2 are driven by independent engines 9 and 8*, respectively. The intermediate roll is driven'through either one of the working rolls.

In Figs. 5 and 6, I have illustrated a twohigh roll in which the rolls l and 2 are independently driven by separate engines 9" and 8 i As stated above, instead ofthe steam engines, as indicated in diagram in the drawings, electric motors may be used without departing from the spirit of the invention.

ltwill be seen that by driving the rolls independently and at the same speed the diameterof the rolls need not be the same and one roll can be of a greater diameter than the other, so long as theengine' is regulated so that the surface speed of the rolls is the same- Therefore, the rolls can be used until the chill isentirely worn away. In. practice, ,one roll wears away more rapidly than. another and when one roll is slightly worn. the other roll must be dressed Copies of this patent may be obtained for to the. same diameter as the worn roll, but where an independent drive is used th1s is not necessary and each roll can be used without dressing-until completely worn.

While I have illustrated the two engines 8 and 9 as being of the ordinary type of reciprocating engines, it will be understood that they may be arranged as compound engines, one cylinder driving one roll and the other cylinder driving the other roll.

I claim V 1. The combination in a rolling mill, of

two working rolls; and means for independ- V 3. The combination in a rolling mill, oit

two working rolls; a supporting roll for each working roll; and means vfor independently, driving each working roll so that the surface speed .ofthe working rolls will'be the same.

' 7 JOHN S. WORTH five cents each, by addressing the Commissioner of Iatents; Washington, D. G. 

